Ok, so heres my problem - not specifically an aeroplane one, but glow engines, and i thought i'd find a good knowledge base here
I am building a hovercraft with separate lift and thrust engines (Thunder tiger GP42 for thrust, and Pro46 for lift)
For the testing i was using individual 4oz tanks for each engine, but they run dry after about 10 mins.
I plan to use a single 50oz tank to feed both engines, with the thrust engine having a 2oz header tank to lift the clunk in line with the carb needle, and the larger lift engine providing the pressure.

My question is pretty basic :

Will running two engines of a single exhaust pressure line be ok, or should i use both?

Will pressurising the inlet to one engine from another flood the engines ?

Is this the best way of doing it ??

(quick schematic below)